Fused-quartz valve



Patented June 3, 193,()l l 1.... j

Y THoMAs lBU'animar)fr,y or nlnrnorrglavrrcmenn y FusEn-eulnirz n i l l.

Substitution for application Serial No.

This applicationv is a substitute for myl Serial No. 109,571, filed' prior application May 17 1926.

' My invention relates to valves in par.- 5 ticular to the adaptation of fused quartz f thereto.

It is the object of my invention to provide be affectedv by theV f sle`eve 'beingvr p valve. :iAi second inletlpassageway: Gis :ip'roz-L a valve which will not heat found in an internal combustion en- ;10 gine, which has sufficient strength forr the" valve, which usually' purpose of forniinga y needs no lubrication as'fitv is lnot a'ected by heat to such fan appreciable degree as to cause stickingandfurther becauseit,may` Y F15 be ground to form a fineness of fitvfdvesiredl Y without leakage. f

I have discovered anew use andnew property inV a non-carbonaceous and non-'v' metallic material, fusedquartz, when adapt.

20 Yed to valves for' internall combustion yengines vand for liners for rotary valves lin internal' combustion engines. ,Y I

Heretofore, valves made ofmetal Ahave all been subjected to the difficulties arisingf f 25 from the intense heating and 'alternatecoohthe" utilization of the necessarylength of rotaryff date in great diiiiculties,I

ing. ln .rotary valves vin particular,

valve has resulted to in that the problem Aoflubrication has never 3o been solved nor the problernof preventing the long rotary valve orits sleeve rfrom warping.

.By that l can forni the quartz in the desired size, can grindv ittooptical finenessofsum face and with'opticaljaccuracy and can mold',

in it the metal parts tion and support or it will t-into associated metal parts.'

Referring to thedrawings:`Vl

with a fused quartz liner;

41rigure 2 is a section on Figure 1.

Referring to the drawings in detail, it

will be understood that my invention `does 1 indicates :an f1 f into Vithe inlet finanifold;whencethel gases p :pass through the inlet passagew-ay through ll-in theiquartz'isleevee5,;such

I another f .inlet passageway acket; spaces '13; `for utilizing fusedr quartz I have .found necessary fork its a ctuaA I cansoinoldit that'gj. A, i ,Y a, l y p extent of 'the openingofithegports-von the Y 1Eigurer 1 isatransverse section through C the top of the valve housings and cylinders of an internal combustion rotary valve env Y gine showing the use of afused quartzv valvev 45r as a liner and theluse 0f a fused quartz valve the line 2-2 of thecrank' shaftffy y V:III-have;fouiid'fthatthe modulus Lofel-as v y'.ticity; in .compression .1o-fV ifgu'sedlquantzj'islioo :or lvalve construction,` but 1in lthe adaptation ,i

Theidrawings :show a typicali:installation.vk let lport for incoming .gases the aperture l the liner: forthe :inlet-rotary f vide'd in ythe manifold `rwhich coincides i with in the @sleeve lin Vorder-to?register v:with.thezpassageway 'Z shown in the rotaryfvalve-offused quartz.' l, The :inlets 3 and 41' register =wi-th the 1pas`sjage=-" wayv9ufin xthe valvefoffusedlquar-tziwhichy 5in turn registerslwith thespassagewayffil'o in the `other'vvalh'ofthe"sleevesfand withjthe L inlet. passageway 11 :ofc-the :cylinder f12. vThe v y r417o f the. circulation of i coolf cylinders "areiprovidednwith the usual-water ing iuids.: An exit port 14 is provided/in llthej'l cylinder I "whi'ch ris adaptedgto register with#then .exhaust .port l5 .in/fthe fused quartz exhaustvalve 16 which-isadaptedtoiregisterw t `:with aetlie .exhaust-1 port T17 of fftliegexhaust fkmanifold 318.ThexeXitx-port19iis provided i' 1 .f in :therexhajust manifold. provided :inl connection with .f-theftherzfjthe y two cylinders, v 1 Y Y x :Turningeto'thefinletvalwe sleeve, it will 1. `.Tliis head -iss-actuatedgby fthetoggle i yl .ers` 22and@123` pivotallyfsupported at 22@ '..QfBy rotating the tsleeveflgthe intake side can Kbe variedand 'the ,operation :of'tlielfenginethereby controlled.' l

" f @The alves "are Vvrotated,by the ,gjeiar's' 26. i vmounted onfthe ends thereof v'vhichgv are in turn 4actuated Vworms-which lie Abeneath the gears (mounted. -on-r the shafti'esupported v'inthe brackets 283 and #actuated-through ther` Similar-'portsare f v940,000 pounds per square inch. Its compressive strength is probably greater than 191,000 pounds to each square inch.- Its modulus of rupture obtained by using an Amsler Laffon torsionrmachine Was .15 m. k, g. (109 feet. lb. capacity) reading to .00 1 m. k. (.07 1b.). These figures are indicative ofthe strength and other physical characteristics of this material. The tensile strength is 6,950 lbs. per sq. inch. Fusedquartz is serviceable up to 1000 degrees centigrade Without injury, has a remarkably small coefficient of thermal expansion, is capable of being produced Yon a commercial scale and Will take' a polish like optical glass so that sleeve to adjust its position relative to said manifold and said inlet fused quartz rotary valve.

In testimony whereof, I afix my signature,

THOMAS E. BURKHARDT.

a great accuracy of finish may be secured.

j v It is my purpose to utilize either clear or translucent fused quartz, as it is inert and islnot subjected to the usual chemical reactions, such as pitting, to which Vmetallic valves are subject. Fused quartz has such changes of temperature such as found in in- Y but piston valves and slide valves, and sleeve a low coeiicient of thermal expansion that a rod of quartz one meter in length- Will expand only about six-tenths of a millimeter .forV a thousand degree centigrade rise in temperature. Thus, I find that there is small probability of fracture under sudden ternal combustion engines.

v It Will Vbe understood that I desire to comprehend Within my invention such modiications and adaptations as may be neces- .saryi @I desire to comprehend WithinV the invention the utilization of this material to valves of all kinds, not only rotary valves valves.

-. Having thus fully described my invention,

- what I claim as new and desire to secure by Letters Patent, is

1. In combination, an internal combustion engine of metallic structure, metallic manifolds therefor and fused quartz rotary valves supported thereby and rotating therein.

2. In combination in a rotary valve engine of metallic cylinders, a metallic inlet manifold, a fused quartz sleeve rotatably mounted therein, a rotary valve mounted Within said sleeve and rotating therein, means for. driving saidl valve in rotation, an exhaust manifold and a fused quartz rotary valve Vrotating therein, and means for rotat- 

